you can also just create a running total and add it to the base field
Running Total
name = IncreaseSum
field to summarize=salary increase
type=sum
evaluate=on each record
reset=on change of group
create a formula to add the base value to this running total to get waht you want
table.salarybase + #IncreaseSum
place this formula field in the detail section
if the base value is not carried on each row for some reason use a second RT as the max of that field reset on each group instead of the field itself
Edited by DBlank - 08 Jul 2014 at 3:42am